Drying can or cylinder.



R; PRITGHARD. DRYING CAN 0B CYLINDER. uPLIon mn FILED OOT.15, 190a.

Patented Aug. 16, 1910.

,f a/entor W PM THE NORRIS PETERS 50., WASHINGTON, D. C.

ROBERT PRITCHARID, 0F BURY, ENGLAND;

DRYING can on CYLINDER.

Specification of Letters Patent.

Patented Aug. 16, 1910.

Application filed. October 15, 1909. Serial No. 522,766.

To all whom it may concern.-

Be it known that I, ROBERT PRITGI-IARD, of Bury, in the county ofLancaster, England, have invented certain new and useful Improvements inand Connected with Drying Cans or Cylinders, of which the following is aspecification.

In connection with finishing and the like machines, drying cylinders areemployed for the purpose of drying the fabric or other materialundergoing treatment. These drying cylinders or cans are constructed oftin, copper or the like and steam is admitted to their interior for thepurpose of heating the surface of the said cylinders. The heat thusacquired is utilized to dry the fabrics or other material passing overthe outside surface of the cylinder and in accomplishing this thecylinder becomes cool to an extent which brings about condensation ofthe StQitl'il admitted to its interion' Water of comlensation is thusdeposited within the cylinder and it is necessary in order to maintainthe surface of the cylinder at a high temperature in order toeffectively dry the material that such water shall be discharged orejected from the cylinder.

The object of my present invention is to construct an improved form ofdevice and to apply it to drying cylinders or cans in such a manner thatthe water of condensation is continuously guided toward the dischargeend of the cylinder or can without regard to the direction of rotationof the cylinder. Further than this by the application of my device Imaterially strengthen the cylinder and obviate the employment of ironblocks or stays for this purpose besides producing a perfectly balancedcylinder.

In order that my invention may be better understood I have appended asheet of drawings whereon:-

Figure 1 is a longitudinal section of a drying cylinder embodying myinvention, on line C-D of Fig. 2. Fig. 2 is a transverse section of thesame on line A--B, Fig. 1.

In carrying my invention into effect I employ the ordinary constructionof drying cylinder A having suitably formed ends B B and inlet anddischarge orifices in the trunnions C C. To the inner wall or surface ofthe cylinder A, I suitably attach two spiral water conductors or webs ofmetal D D. It will be observed the spiral webs D D cross each othertwice as shown at E and H. The webs consist of a strip of metal suitablyattached to and projecting at right angles from the inner surface of thecylinder as clearly shown at I I. I suitably construct the spiral webswhere they cross at E and H with a mid-feather J in order that the waterwhich either one may be guiding or conducting toward the dischargeorifice K will be projected accurately forward on to the farther portionof the said conducting web and will not run back or down the wrong Web.The crossing portions can be arranged to form various angles accordingto the diameter of cylinders employed.

I can employ any suitable construction of water discharge boxes at theend of the cylinder or can, and have shown one suitable form in. Figs. 1and 2. The water collected by the webs is guided or conducted into oneof the boxes L or M according to the direction in which the cylinder isrotating and from these boxes it is discharged into the secondary box 0and thence out through the trunnion orifice K. It will be observed thatthe discharge pipes N N of the boxes L and M pass beyond each other andalso beyond the center of the orifice K. This is in order to prevent anyof the water running into the empty box and consequently back into thecylinder.

It will be understood that the water is conducted or guided along onespiral web of metal should the cylinder be rotating in a right handdirection and along the other when rotating in the opposite direction,the webs being therefore alternately operative. I can therefore rotatethe cylinder in either direction and can discharge or eject the waterfrom it while the cylinder is thus rotating. If necessary in the case oflong cylinders the device will require constructing with a greaternumber of spirals but this is only a modification of my device anddemands no material alteration.

Claim:

A drying cylinder provided internally with two spiral, oppositelyinclined con- In testimony whereof I have aflixed my ducting welosadapted to conduct Water signatu e, in presence of two Witnesses.

toward one end of the cylinder, said webs intersecting each other beingprovided at the places of intersection with means for Witnesses:maintaining a continuous flow of ater FRANK NASMITH, along either web.HERBERT LIvEsEY.

ROBERT PRITCHARD.

